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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 331 · 40 questions
TalentJR

What you do (Yellow or red?): 1. Mix turmeric powder with a little water into a paste and paint it on white paper strips; let them dry. 2. Put a drop of soap solution on one strip and a drop of lemon juice on another. 3. Write down the colour each drop makes. 4. Add lemon juice to the reddish spot and watch it change back.

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  1. 1.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) lemon juice (d) a battery cell
  2. 2.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) your school uniform (d) an old shirt or apron
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) a balloon (d) a dropper or spoon
  4. 4.🧺 Which of these is needed for the turmeric test? (a) yeast (b) white paper strips (c) a balloon (d) a magnet
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  6. 6.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) reddish (d) bright blue
  7. 7.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  8. 8.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  9. 9.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) turmeric powder (d) a battery cell
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the liquid we test
  12. 12.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  13. 13.True or false: plain water keeps turmeric yellow. (a) False (b) True
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
  15. 15.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  16. 16.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the liquid we test (d) the number of drops
  18. 18.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  19. 19.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) plain water (d) detergent water
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) water (d) a mirror
  21. 21.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) a dropper or spoon (d) a balloon
  22. 22.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  23. 23.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  24. 24.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  25. 25.🫧 Which of these is neutral? (a) curd (b) lemon juice (c) sugar water (d) orange juice
  26. 26.🫧 Which of these is an acid? (a) curd (b) detergent water (c) plain water (d) sugar water
  27. 27.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap is magnetic (d) soap water is a base
  28. 28.True or false: salt water is an acid. (a) False (b) True
  29. 29.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a comb (c) lemon juice (d) turmeric powder
  32. 32.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  33. 33.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) sugar water (d) soap solution
  34. 34.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  35. 35.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  36. 36.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  37. 37.True or false: tamarind water is an acid. (a) False (b) True
  38. 38.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  39. 39.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) yeast (c) turmeric powder (d) a balloon
  40. 40.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed

Answer key

  1. a battery cell
  2. an old shirt or apron
  3. a balloon
  4. white paper strips
  5. True
  6. reddish
  7. needed
  8. False
  9. not needed
  10. a battery cell
  11. the liquid we test
  12. turns reddish-brown
  13. True
  14. we keep it the same
  15. an acid
  16. neutral
  17. the colour we see
  18. not needed
  19. detergent water
  20. a mirror
  21. a balloon
  22. stays yellow
  23. turns reddish-brown
  24. False
  25. sugar water
  26. curd
  27. soap water is a base
  28. False
  29. True
  30. we keep it the same
  31. a comb
  32. a base
  33. sugar water
  34. a base
  35. False
  36. stays yellow
  37. True
  38. True
  39. turmeric powder
  40. needed

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